I got a Logitech G11 on offer from ebuyer for Â£20. Whilst this is of no use to the US market ( although it is a US keyboard) and has been discontinued it may well be worth looking out for. 18 programmable keys ( x3 giving 54 individual settings ) blue lit keys I think it's an excellent keyboard for the money I paid.

If you want a cheap and decent keyboard, I wouldn't go illuminated because obviously they have to make up the cost somewhere. So ultimately, the keyboard itself might be crappy quality and not last long at all.